218468416 has 28 divisors (see below), whose sum is σ = 434809900. Its totient is φ = 108910080.

The previous prime is 218468413. The next prime is 218468429. The reversal of 218468416 is 614864812.

It can be written as a sum of positive squares in 2 ways, for example, as 128142400 + 90326016 = 11320^2 + 9504^2 .

It is not an unprimeable number, because it can be changed into a prime (218468413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17446 + ... + 27226.

It is an arithmetic number, because the mean of its divisors is an integer number (15528925).

Almost surely, 2^218468416 is an apocalyptic number.

It is an amenable number.

218468416 is a deficient number, since it is larger than the sum of its proper divisors (216341484).

218468416 is an equidigital number, since it uses as much as digits as its factorization.

218468416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142 (or 10132 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 218468416 is about 14780.6771157481. The cubic root of 218468416 is about 602.2769188414.

The spelling of 218468416 in words is "two hundred eighteen million, four hundred sixty-eight thousand, four hundred sixteen".